diff --git a/frappe/tests/ui_test_helpers.py b/frappe/tests/ui_test_helpers.py
index d3e6193699..8eec644115 100644
--- a/frappe/tests/ui_test_helpers.py
+++ b/frappe/tests/ui_test_helpers.py
@@ -71,6 +71,6 @@ def create_contact_phone_nos_records():
 
 	doc = frappe.new_doc('Contact')
 	doc.first_name = 'Test Contact'
-	for x in range(1000):
-		doc.append('phone_nos', {'phone': '123456789'})
+	for index in range(1000):
+		doc.append('phone_nos', {'phone': '123456{}'.format(index)})
 	doc.insert()
\ No newline at end of file